plat: imx8mq: fix the system wakeup by non-wakeup IRQ.

When system enter suspend, it should be only wakeup by
specific wakeup source, so non-wakeup source should be
masked before enter suspend.

Signed-off-by: Bai Ping <ping.bai@nxp.com>
(cherry picked from commit 16e7edea57819a2802a528135b1d8f56a2e85bbd)
2 files changed